[u/mrichter/AliRoot.git] / PHOS / AliPHOSClusterizerv1.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

//_________________________________________________________________________
// A brief description of the class
//*-- Author : Yves Schutz  SUBATECH 
//////////////////////////////////////////////////////////////////////////////

// --- ROOT system ---

#include "TMath.h" 

// --- Standard library ---

#include "iostream.h"

// --- AliRoot header files ---

#include "AliPHOSClusterizerv1.h"
#include "AliPHOSDigit.h"
#include "AliPHOSEmcRecPoint.h"
#include "AliPHOSPpsdRecPoint.h"
#include "AliPHOSv0.h" 
#include "AliRun.h" 

ClassImp(AliPHOSClusterizerv1)

//____________________________________________________________________________
AliPHOSClusterizerv1::AliPHOSClusterizerv1()
{
  fA                       = 0.;
  fB                       = 0.01 ;
  fNumberOfEmcClusters     = 0 ; 
  fNumberOfPpsdClusters    = 0 ; 
  fEmcClusteringThreshold  = 0.1;   
  fEmcEnergyThreshold      = 0.01;    
  fPpsdClusteringThreshold = 0.00000015; 
  fPpsdEnergyThreshold     = 0.0000001;  
  fW0                      = 4.5 ;
  fLocMaxCut               = 0.06 ;
}

//____________________________________________________________________________
Int_t AliPHOSClusterizerv1::AreNeighbours(AliPHOSDigit * d1, AliPHOSDigit * d2)
{
  // neigbours are defined as digits having at least common virtix
  // The order of A and B in AreNeighbours(A,B) is important: first (A) should be digit 
  // in cluster, which compared with digits, which not clasterized yet  
  Int_t rv = 0 ; 

  AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ;

  Int_t relid1[4] ; 
  geom->AbsToRelNumbering(d1->GetId(), relid1) ; 

  Int_t relid2[4] ; 
  geom->AbsToRelNumbering(d2->GetId(), relid2) ; 
 
  if ( (relid1[0] == relid2[0]) && (relid1[1]==relid2[1]) ) { // inside the same PHOS module and the same PPSD Module 
    Int_t RowDiff = TMath::Abs( relid1[2] - relid2[2] ) ;  
    Int_t ColDiff = TMath::Abs( relid1[3] - relid2[3] ) ;  
    
    if (( ColDiff<=1 )  && ( RowDiff <= 1 )){
      rv = 1 ; 
    }
    else {
      if((relid2[2] > relid1[2]) && (relid2[3] > relid1[3]+1)) 
	rv = 2; //  Difference in row numbers is too large to look further 
    }

  } 
  else {
    
    if( (relid1[0] < relid2[0]) || (relid1[1] < relid2[1]) )  
      rv=2 ;

  }
  
  return rv ; 
}

//____________________________________________________________________________
void AliPHOSClusterizerv1::FillandSort(const DigitsList * dl, TObjArray * tl) 
{
  // copies the digits with energy above thershold and sorts the list
  // according to increasing Id number


  AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ;
  Int_t relid[4] ;  
  
  TIter next(dl) ; 
  AliPHOSDigit * digit ;
  
  while ( (digit = (AliPHOSDigit *)next()) ) { 
    
    Int_t id    = digit->GetId() ; 
    Float_t ene = Calibrate(digit->GetAmp()) ; 
    geom->AbsToRelNumbering(id, relid) ;
    
    if(relid[1]==0){ // EMC
      if ( ene > fEmcEnergyThreshold ) 
	tl->Add(digit) ;
    }

    else { //Ppsd
      if ( ene > fPpsdEnergyThreshold )
	tl->Add(digit) ;	
    }

  }
  tl->Sort() ; 
}

//____________________________________________________________________________
void AliPHOSClusterizerv1:: GetNumberOfClustersFound(Int_t * numb) 
{
 numb[0] = fNumberOfEmcClusters ; 
 numb[1] = fNumberOfPpsdClusters ; 
}

//____________________________________________________________________________
Bool_t AliPHOSClusterizerv1::IsInEmc(AliPHOSDigit * digit) 
{
   Bool_t rv = kFALSE ; 

  AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ;  

  Int_t relid[4] ; 
  geom->AbsToRelNumbering(digit->GetId(), relid) ; 

  if ( relid[1] == 0  )
    rv = kTRUE; 

  return rv ; 
}

//____________________________________________________________________________
void AliPHOSClusterizerv1::MakeClusters(const DigitsList * dl, RecPointsList * emcl, RecPointsList * ppsdl)
{

  // Fill and sort the working digits list
  TObjArray TempoDigitsList( dl->GetEntries() ) ;
  this->FillandSort(dl, &TempoDigitsList) ; 


  // Clusterization starts  
  TIter nextdigit(&TempoDigitsList) ; 
  AliPHOSDigit * digit ; 
  Bool_t NotRemoved = kTRUE ;

  while ( (digit = (AliPHOSDigit *)nextdigit()) ) { // scan over the list of digits
    AliPHOSRecPoint * clu ; 

    int * ClusterDigitsList[dl->GetEntries()] ;   
    Int_t index ;
    if (( (this->IsInEmc(digit)) && (Calibrate(digit->GetAmp()) > fEmcClusteringThreshold ) ) || 
        ( (!this->IsInEmc(digit)) && (Calibrate(digit->GetAmp()) > fPpsdClusteringThreshold ) ) ) {
  
      Int_t iDigitInCluster = 0 ; 

      if  (this->IsInEmc(digit) ) {   
        new ((*emcl)[fNumberOfEmcClusters]) AliPHOSEmcRecPoint(fW0, fLocMaxCut) ;// start a new EMC RecPoint

	clu = (AliPHOSEmcRecPoint *) (*emcl)[fNumberOfEmcClusters++] ; 
 
	clu->AddDigit(*digit,Calibrate(digit->GetAmp())) ; 

	ClusterDigitsList[iDigitInCluster++] = (int* ) digit ;	
	TempoDigitsList.Remove(digit) ; 
      }

      else { 
	new ((*ppsdl)[fNumberOfPpsdClusters]) AliPHOSPpsdRecPoint() ;// start a new PPSD cluster
 	clu =  (AliPHOSPpsdRecPoint *) ppsdl->At(fNumberOfPpsdClusters++)  ;  
	clu->AddDigit(*digit,0.) ;	
	ClusterDigitsList[iDigitInCluster++] = (int* ) digit ;	
        TempoDigitsList.Remove(digit) ; 
        nextdigit.Reset() ;
	
	//Here we remove resting EMC digits, which can not make cluster
        if(NotRemoved){ 
	  
	  while( (digit = (AliPHOSDigit *)nextdigit()) ){
	    
            if(IsInEmc(digit)) TempoDigitsList.Remove(digit) ;
            else 
	      break ;
	    
	  }// while digit  
	  
	} // if NotRemoved 
	
      } // else        
      
      nextdigit.Reset() ;

      AliPHOSDigit * digitN ; 
      index = 0 ;
      while (index < iDigitInCluster){ // scan over digits already in claster 
	digit = (AliPHOSDigit *) ClusterDigitsList[index++]  ;      

        while ( (digitN = (AliPHOSDigit *)nextdigit()) ) { // scan over the reduced list of digits 
	  Int_t ineb = AreNeighbours(digit, digitN);   //  call (digit,digitN) in THAT oder !!!!!
          switch (ineb ) {
          case 0 :   // not a neibors
	    break ;	 
	  case 1 :    // Are neibors 
	    clu->AddDigit(*digitN,Calibrate(digitN->GetAmp())) ;
	    ClusterDigitsList[iDigitInCluster++] =(int*) digitN ; 
	    TempoDigitsList.Remove(digitN) ;
	    break ;
          case 2 :  // to far from each other
	    goto endofloop;   
	  } // switch
	  
	} // while digitN

      endofloop: ;
	nextdigit.Reset() ; 
	
      } // loop over cluster     
 
   }  //below energy theshold  
  
  } // while digit

  TempoDigitsList.Clear() ; 
}

//____________________________________________________________________________
void AliPHOSClusterizerv1::PrintParameters() 
{
  cout << "PHOS Clusterizer version 1 :" << endl 
       << "                       EMC  Clustering threshold = " << fEmcClusteringThreshold << endl
       << "                       EMC  Energy threshold     = " << fEmcEnergyThreshold << endl                  
       << "                      PPSD  Clustering threshold = " << fPpsdClusteringThreshold << endl
       << "                      PPSD  Energy threshold     = " << fPpsdEnergyThreshold << endl ;                
}
Commit	Line	Data
d15a28e7	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
	16	//_________________________________________________________________________
	17	// A brief description of the class
	18	//*-- Author : Yves Schutz SUBATECH
	19	//////////////////////////////////////////////////////////////////////////////
	20
	21	// --- ROOT system ---
	22
	23	#include "TMath.h"
	24
	25	// --- Standard library ---
	26
	27	#include "iostream.h"
	28
	29	// --- AliRoot header files ---
	30
	31	#include "AliPHOSClusterizerv1.h"
	32	#include "AliPHOSDigit.h"
	33	#include "AliPHOSEmcRecPoint.h"
	34	#include "AliPHOSPpsdRecPoint.h"
	35	#include "AliPHOSv0.h"
	36	#include "AliRun.h"
	37
	38	ClassImp(AliPHOSClusterizerv1)
	39
	40	//____________________________________________________________________________
	41	AliPHOSClusterizerv1::AliPHOSClusterizerv1()
	42	{
	43	fA = 0.;
	44	fB = 0.01 ;
	45	fNumberOfEmcClusters = 0 ;
	46	fNumberOfPpsdClusters = 0 ;
	47	fEmcClusteringThreshold = 0.1;
	48	fEmcEnergyThreshold = 0.01;
	49	fPpsdClusteringThreshold = 0.00000015;
	50	fPpsdEnergyThreshold = 0.0000001;
	51	fW0 = 4.5 ;
	52	fLocMaxCut = 0.06 ;
	53	}
	54
	55	//____________________________________________________________________________
	56	Int_t AliPHOSClusterizerv1::AreNeighbours(AliPHOSDigit * d1, AliPHOSDigit * d2)
	57	{
	58	// neigbours are defined as digits having at least common virtix
	59	// The order of A and B in AreNeighbours(A,B) is important: first (A) should be digit
	60	// in cluster, which compared with digits, which not clasterized yet
	61	Int_t rv = 0 ;
	62
	63	AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ;
	64
65	Int_t relid1[4] ;
66	geom->AbsToRelNumbering(d1->GetId(), relid1) ;
67
68	Int_t relid2[4] ;
69	geom->AbsToRelNumbering(d2->GetId(), relid2) ;
70
71	if ( (relid1[0] == relid2[0]) && (relid1[1]==relid2[1]) ) { // inside the same PHOS module and the same PPSD Module
72	Int_t RowDiff = TMath::Abs( relid1[2] - relid2[2] ) ;
73	Int_t ColDiff = TMath::Abs( relid1[3] - relid2[3] ) ;
74
75	if (( ColDiff<=1 ) && ( RowDiff <= 1 )){
76	rv = 1 ;
77	}
78	else {
79	if((relid2[2] > relid1[2]) && (relid2[3] > relid1[3]+1))
80	rv = 2; // Difference in row numbers is too large to look further
81	}
82
83	}
84	else {
85
86	if( (relid1[0] < relid2[0]) \|\| (relid1[1] < relid2[1]) )
87	rv=2 ;
88
89	}
90
91	return rv ;
92	}
93
94	//____________________________________________________________________________
95	void AliPHOSClusterizerv1::FillandSort(const DigitsList * dl, TObjArray * tl)
96	{
97	// copies the digits with energy above thershold and sorts the list
98	// according to increasing Id number
99
100
101	AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ;
102	Int_t relid[4] ;
103
104	TIter next(dl) ;
105	AliPHOSDigit * digit ;
106
107	while ( (digit = (AliPHOSDigit *)next()) ) {
108
109	Int_t id = digit->GetId() ;
110	Float_t ene = Calibrate(digit->GetAmp()) ;
111	geom->AbsToRelNumbering(id, relid) ;
112
113	if(relid[1]==0){ // EMC
114	if ( ene > fEmcEnergyThreshold )
115	tl->Add(digit) ;
116	}
117
118	else { //Ppsd
119	if ( ene > fPpsdEnergyThreshold )
120	tl->Add(digit) ;
121	}
122
123	}
124	tl->Sort() ;
125	}
126
127	//____________________________________________________________________________
128	void AliPHOSClusterizerv1:: GetNumberOfClustersFound(Int_t * numb)
129	{
130	numb[0] = fNumberOfEmcClusters ;
131	numb[1] = fNumberOfPpsdClusters ;
132	}
133
134	//____________________________________________________________________________
135	Bool_t AliPHOSClusterizerv1::IsInEmc(AliPHOSDigit * digit)
136	{
137	Bool_t rv = kFALSE ;
138
139	AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ;
140
141	Int_t relid[4] ;
142	geom->AbsToRelNumbering(digit->GetId(), relid) ;
143
144	if ( relid[1] == 0 )
145	rv = kTRUE;
146
147	return rv ;
148	}
149
150	//____________________________________________________________________________
151	void AliPHOSClusterizerv1::MakeClusters(const DigitsList * dl, RecPointsList * emcl, RecPointsList * ppsdl)
152	{
153
154	// Fill and sort the working digits list
155	TObjArray TempoDigitsList( dl->GetEntries() ) ;
156	this->FillandSort(dl, &TempoDigitsList) ;
157
158
159
160	// Clusterization starts
161	TIter nextdigit(&TempoDigitsList) ;
162	AliPHOSDigit * digit ;
163	Bool_t NotRemoved = kTRUE ;
164
165	while ( (digit = (AliPHOSDigit *)nextdigit()) ) { // scan over the list of digits
166	AliPHOSRecPoint * clu ;
167
168	int * ClusterDigitsList[dl->GetEntries()] ;
169	Int_t index ;
170	if (( (this->IsInEmc(digit)) && (Calibrate(digit->GetAmp()) > fEmcClusteringThreshold ) ) \|\|
171	( (!this->IsInEmc(digit)) && (Calibrate(digit->GetAmp()) > fPpsdClusteringThreshold ) ) ) {
172
173	Int_t iDigitInCluster = 0 ;
174
175	if (this->IsInEmc(digit) ) {
176	new ((*emcl)[fNumberOfEmcClusters]) AliPHOSEmcRecPoint(fW0, fLocMaxCut) ;// start a new EMC RecPoint
177
178	clu = (AliPHOSEmcRecPoint ) (emcl)[fNumberOfEmcClusters++] ;
179
180	clu->AddDigit(*digit,Calibrate(digit->GetAmp())) ;
181
182	ClusterDigitsList[iDigitInCluster++] = (int* ) digit ;
183	TempoDigitsList.Remove(digit) ;
184	}
185
186	else {
187	new ((*ppsdl)[fNumberOfPpsdClusters]) AliPHOSPpsdRecPoint() ;// start a new PPSD cluster
188	clu = (AliPHOSPpsdRecPoint *) ppsdl->At(fNumberOfPpsdClusters++) ;
189	clu->AddDigit(*digit,0.) ;
190	ClusterDigitsList[iDigitInCluster++] = (int* ) digit ;
191	TempoDigitsList.Remove(digit) ;
192	nextdigit.Reset() ;
193
194	//Here we remove resting EMC digits, which can not make cluster
195	if(NotRemoved){
196
197	while( (digit = (AliPHOSDigit *)nextdigit()) ){
198
199	if(IsInEmc(digit)) TempoDigitsList.Remove(digit) ;
200	else
201	break ;
202
203	}// while digit
204
205	} // if NotRemoved
206
207	} // else
208
209	nextdigit.Reset() ;
210
211	AliPHOSDigit * digitN ;
212	index = 0 ;
213	while (index < iDigitInCluster){ // scan over digits already in claster
214	digit = (AliPHOSDigit *) ClusterDigitsList[index++] ;
215
216	while ( (digitN = (AliPHOSDigit *)nextdigit()) ) { // scan over the reduced list of digits
217	Int_t ineb = AreNeighbours(digit, digitN); // call (digit,digitN) in THAT oder !!!!!
218	switch (ineb ) {
219	case 0 : // not a neibors
220	break ;
221	case 1 : // Are neibors
222	clu->AddDigit(*digitN,Calibrate(digitN->GetAmp())) ;
223	ClusterDigitsList[iDigitInCluster++] =(int*) digitN ;
224	TempoDigitsList.Remove(digitN) ;
225	break ;
226	case 2 : // to far from each other
227	goto endofloop;
228	} // switch
229
230	} // while digitN
231
232	endofloop: ;
233	nextdigit.Reset() ;
234
235	} // loop over cluster
236
237	} //below energy theshold
238
239	} // while digit
240
241	TempoDigitsList.Clear() ;
242	}
243
244	//____________________________________________________________________________
245	void AliPHOSClusterizerv1::PrintParameters()
246	{
247	cout << "PHOS Clusterizer version 1 :" << endl
248	<< " EMC Clustering threshold = " << fEmcClusteringThreshold << endl
249	<< " EMC Energy threshold = " << fEmcEnergyThreshold << endl
250	<< " PPSD Clustering threshold = " << fPpsdClusteringThreshold << endl
251	<< " PPSD Energy threshold = " << fPpsdEnergyThreshold << endl ;
252	}